org.deegree.graphics
Class AbstractLayer

java.lang.Object
  org.deegree.graphics.AbstractLayer

All Implemented Interfaces:

Layer

Direct Known Subclasses:

FeatureLayer, LazyRasterLayer, OWSRasterLayer, RasterLayer

abstract class AbstractLayer
extends Object
implements Layer

A Layer is a collection of Features or rasters building a thematic 'unit' waterways or country borders for example. Features or raster can be added or removed from the layer. A Feature or raster can e changed by a modul of the application using the layer because only references to Features or rasters are stored within a layer.

Version:

$Revision: 19800 $ $Date: 2009-09-26 12:33:09 +0200 (Sa, 26. Sep 2009) $

Author:

Andreas Poth

Field Summary

protected Envelope	boundingbox bbox of the layer
protected CoordinateSystem	cs Of the layer
protected List<EventController>	eventController List of controllers.

Constructor Summary

AbstractLayer(String name)
creates a layer with EPSG:4326 as default coordinate system

AbstractLayer(String name, CoordinateSystem crs)
Creates a new AbstractLayer object.

Method Summary

void	addEventController(LayerEventController obj) adds an eventcontroller to the MapView that's reponsible for handling events that targets the map.
Envelope	getBoundingBox() returns the BoundingBox (Envelope) of Layer.
CoordinateSystem	getCoordinatesSystem() returns the coordinate reference system of the MapView
String	getName() returns the name of the layer
boolean	isValid() As default the method returns true, but it may be overwritten by extending classes
void	removeEventController(LayerEventController obj)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.deegree.graphics.Layer

setCoordinatesSystem

Field Detail

cs

protected CoordinateSystem cs

Of the layer

boundingbox

protected Envelope boundingbox

bbox of the layer

eventController

protected List<EventController> eventController

List of controllers.

Constructor Detail

AbstractLayer

AbstractLayer(String name)
        throws Exception

creates a layer with EPSG:4326 as default coordinate system

Parameters:

name -

Throws:

Exception

AbstractLayer

AbstractLayer(String name,
              CoordinateSystem crs)
        throws Exception

Creates a new AbstractLayer object.

Parameters:

name -

crs -

Throws:

Exception

Method Detail

getName

public String getName()

returns the name of the layer

Specified by:

getName in interface Layer

Returns:

the name of the layer

getBoundingBox

public Envelope getBoundingBox()

returns the BoundingBox (Envelope) of Layer. This is the BoundingBox of the layers data. The BoundingBox of the View maybe larger or smaller

Specified by:

getBoundingBox in interface Layer

Returns:

the BoundingBox (Envelope) of Layer

getCoordinatesSystem

public CoordinateSystem getCoordinatesSystem()

returns the coordinate reference system of the MapView

Specified by:

getCoordinatesSystem in interface Layer

Returns:

the coordinate reference system of the MapView

addEventController

public void addEventController(LayerEventController obj)

adds an eventcontroller to the MapView that's reponsible for handling events that targets the map. E.g.: zooming, panning, selecting a feature etc.

Specified by:

addEventController in interface Layer

Parameters:

obj -

removeEventController

public void removeEventController(LayerEventController obj)

Specified by:

removeEventController in interface Layer

Parameters:

obj -

See Also:

addEventController(LayerEventController)

isValid

public boolean isValid()

As default the method returns true, but it may be overwritten by extending classes

Returns:

true if a layer is valid and should be rendered